Remove Duplicates from Sorted Array LeetCode Solution

Here, We see Remove Duplicates from Sorted Array Solution. This Leetcode problem is done in many programming languages like C++, Java, JavaScript, Python, etc.

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Remove Duplicates from Sorted Array LeetCode Solution

Remove Duplicates from Sorted Array LeetCode Solution

Problem Statement

Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once.

The relative order of the elements should be kept the same.

Example 1:
Input: nums = [1,1,2]
Output: 2, nums = [1,2,_]

Example 2:
Input: nums = [0,0,1,1,1,2,2,3,3,4]
Output: 5, nums = [0,1,2,3,4,_,_,_,_,_]

Remove Duplicates from Sorted Array Leetcode Solution C++

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        nums.erase(std::unique(nums.begin(), nums.end()), nums.end());
        return nums.size();
    }
};
Code language: C++ (cpp)

Remove Duplicates from Sorted Array Leetcode Solution Java

class Solution {
    public int removeDuplicates(int[] nums) {
        if (nums.length == 0) return 0;
    int i = 0;
    for (int j = 1; j < nums.length; j++) {
        if (nums[j] != nums[i]) {
            i++;
            nums[i] = nums[j];
        }
    }
    return i + 1;
    }
}
Code language: Java (java)

Remove Duplicates from Sorted Array Leetcode Solution JavaScript

var removeDuplicates = function(nums) {
    let c=1
    for(let i=1;i<nums.length;i++){
        if(nums[i]==nums[i-1])continue
        nums[c]=nums[i]
        c++
    }
    let l=nums.length-1
    while(l>=c){
        nums.pop()
        l--
    }
};
Code language: JavaScript (javascript)

Remove Duplicates from Sorted Array Leetcode Solution Python

class Solution:
    def removeDuplicates(self, nums):
        len_ = 1
        if len(nums)==0:
            return 0
        for i in range(1,len(nums)):
            if nums[i] != nums[i-1]:
                nums[len_] = nums[i]
                len_ +=1
        return len_
Code language: Python (python)
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